I've been seeing a lot of aquariums using two or more substrate types, and I figure it would be interesting to work worth. Currently my aquarium is 100% EcoComplete, however I think a small area of sand (approx. 1/4 of the tank bed) would be nice in order to get a greater variety of plants and fish.

My plan to keep the two substrates from mixing was to get some kind of plastic barrier, and silicone some rocks to it to make it look nice. Has anybody done this before? Have any pictures or links that I can check out? Also, what would be a good type of plastic barrier and silicone to use that I could pick up at say, Home Depot?_________________2500 gallon (9,450 L) Koi Pond
15 gallon (57 L) Low-light planted
6 gallon (23 L) Betta splendens

I had great luck with just aquarium safe silicone! Only you have to take the tank down and it is time consuming and it will be a while before it is set back up... But hold great!_________________In the End, we will remember not the words of our enemies, but the silence of our friends. - Martin

I'm not interested in taking the tank down, I just rescaped it, and the sand will take up a fraction of the tank. I plan to build a barrier, than place it in the tank after the gravel is moved out of the way._________________2500 gallon (9,450 L) Koi Pond
15 gallon (57 L) Low-light planted
6 gallon (23 L) Betta splendens

Thats it! And you could always re-inforce the silicone with some kind of metal or plastic and put rocks on the silicone to hide it and place it how you want..._________________In the End, we will remember not the words of our enemies, but the silence of our friends. - Martin

Um. I'm not really sure! Anything that is flexible enough to shape the way you want it to look like but sturdy enough to hold its shape!_________________In the End, we will remember not the words of our enemies, but the silence of our friends. - Martin

I managed to find some good plastic barriers (dividers from an old tool box). They are drying right now, and I will post a picture before it put it in the tank._________________2500 gallon (9,450 L) Koi Pond
15 gallon (57 L) Low-light planted
6 gallon (23 L) Betta splendens

Good Idea! Just wondering, What is the size and dimensions of your tank and what are the dimensions of the ssoon-to-be sand portion?_________________In the End, we will remember not the words of our enemies, but the silence of our friends. - Martin